Arduino for Beginners - 2022 Complete Course - Step 6 - Print Distance and Warning Message on LCD Screen

The video tutorial explains how to use an LCD screen with an ultrasonic sensor to display distance measurements. It covers initializing the LCD, creating a function to print distances, and handling different application states like locked and unlocked. The tutorial also demonstrates how to set warning thresholds and test the implementation with practical examples, highlighting the benefits of using an LCD for user instructions.

What is the primary purpose of the LCD screen in this project?

• To control the LED brightness

• To print the current distance measured by the ultrasonic sensor

• To play audio alerts

• To display the current time

What happens when the application is locked?

• An error message is displayed until the application is unlocked

• The application stops measuring distance

• The LCD displays a welcome message

• The LED turns off

What is the warning threshold set in the project?

• 100 centimeters

• 50 centimeters

• 10 centimeters

• 25 centimeters

How does the application behave when the distance is greater than the warning threshold?

• It locks the application

• It displays a warning message

• It displays 'No Obstacle'

• It turns off the LCD

What message is displayed when the application is locked?

• System Error

• No Signal

• Distance: 0 cm

• Obstacle Detected! Press to Unlock

What action is required to unlock the application?

• Sending a command via serial monitor

• Disconnecting the power

• Restarting the system

• Pressing a button

What is one benefit of using an LCD screen in this project?

• It reduces power consumption

• It eliminates the need for a serial monitor

• It allows for wireless communication

• It increases the speed of the application

What happens when an obstacle is detected within 10 centimeters?

• The system reboots

• The application locks

• The application displays a warning

• The LED turns off

How does the application indicate that it is in a normal state?

• By turning on a green LED

• By displaying 'System Ready'

• By showing the distance and 'No Obstacle'

• By playing a sound

What is the role of the yellow LED in this project?

• To indicate power status

• To blink faster as the obstacle gets closer

• To display error messages

• To control the LCD brightness